Spectral analysis considerations relevant to radiation and leaky modes of open-boundary microstrip transmission line

Grimm, J.M.; Nyquist, D.P.

doi:10.1109/22.210244

Cited by 31 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As commented upon, the equivalent network used in the TRE is less accurate as the strip becomes narrower, as illustrated by the inaccurate values of ␤ for W/a Ͻ 0.4 in Figure 4. On the other hand, our method agrees very well with the accurate SD technique due to its full-wave nature, but it is entirely formulated in the SpD, thus avoiding complicated transformations in the SD [11]. Figure 5 shows the convergence behavior of this method for the microstrip structure shown in Figure 2.…”

Section: Validation and Post-processing Resultssupporting

confidence: 51%

“…For totally open planar transmission lines, the preferred technique in past works used a formulation of the Green's functions in the spectral domain (SD), both for 2D [7,8] and 3D [9,10] structures, due to its versatility. However, much numerical effort needs to be done to solve the required Fourier integrals, and much care must be taken to deal with the branch cuts and integration contours [11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A full-wave space-domain method for the analysis of leaky-wave modes in multilayered planar open parallel-plate waveguides

Gómez‐Tornero

Pereira

Álvarez‐Melcón

2004

Int J RF and Microwave Comp Aid Eng

View full text Add to dashboard Cite

Section: Validation and Post-processing Resultssupporting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

A full-wave space-domain method for the analysis of leaky-wave modes in multilayered planar open parallel-plate waveguides

Gómez‐Tornero

Pereira

Álvarez‐Melcón

2004

Int J RF and Microwave Comp Aid Eng

View full text Add to dashboard Cite

“…The fact that different paths of integration in the k x plane may be used for each value of k z leads to the existence of branch points in the complex k z plane [ Chang and Kuester , 1979; Grimm and Nyquist , 1993]. A convenient tool to aid in the discussion of the paths is the concept of a Riemann surface for the longitudinal wave number k z .…”

Section: Introductionmentioning

confidence: 99%

Direct modal transition from space wave to surface wave leakage on microstrip lines

et al. 2005

View full text Add to dashboard Cite

[1] In this paper it is shown for the first time that a novel transition may occur for dominant (quasi transverse electromagnetic (quasi-TEM)) leaky modes on microstrip line, between a leaky mode that leaks into the TM 0 surface wave mode and one that leaks both into the surface wave and into space. The modal evolution of leaky modes as a function of frequency is studied by means of a full-wave spectral domain approach, and it is shown that such transitions occur on microstrip lines that have a critical strip width, which is relatively large. When the strip width is equal to the critical value, a transition frequency will exist at which the attenuation constant of the leaky mode drops exactly to zero and the leaky mode has a real propagation wave number exactly equal to the free-space wave number. At this frequency, the leaky mode transitions from one that leaks into only the surface wave to one that also leaks into space. In a frequency neighborhood of the transition frequency, very large spurious effects may be produced because of interference between the fundamental quasi-TEM mode and the continuous spectrum current.Citation: Baccarelli, P., P. Burghignoli, G. Lovat, S. Paulotto, F. Mesa, and D. R. Jackson (2005), Direct modal transition from space wave to surface wave leakage on microstrip lines, Radio Sci., 40, RS6017,

show abstract

“…The concept of application of leaky waves arose from the suitable deformation of integration path during the implementation the saddle point method in asymptotic calculation of total field around the line. The choice of different paths of integration in complex plane of transversal phase constant can lead to the solutions [5,6] which describe the different mechanisms of losses (e.g., surface wave loss, space wave loss or volume wave loss in the case of covered line).…”

Section: Introductionmentioning

confidence: 99%

Hybrid Radiationb Modes of Microwave Integrated Circuit (Mic) Lines-Theory and Application

Zieniutycz¹

2006

PIER

View full text Add to dashboard Cite

Abstract-Spectral domain approach for continuous spectrum of wide class of microwave integrated circuit (MIC) lines is proposed. The continuous spectrum is treated as a continuum of so called hybrid radiation modes. They are the limits of volume modes of line in which lower and/or upper shieldings are moved to infinity. In the preliminary part of analysis a convenient classification of MIC lines into one-side opened and two-sides opened lines is introduced. The spectral domain representation of hybrid radiation modes is discussed in detail and boundary conditions for visible and invisible parts of spectrum are formulated. The normalization conditions in spectral domain are also proposed for both classes of lines. In the next part of paper an iterative approach in spectral domain is proposed for hr modes of one-side opened line. The boundary conditions for hybrid radiation modes are combined with spectral domain approach and the second order equation is formulated for unknown spectral amplitudes of electric or magnetic fields in visible part of spectrum. Two schemes of iteration are presented and they both lead to solutions classified as hybrid EH (y) and HE (y) modes. In the case of two-sides opened lines the solution is a sum of two partial solutions corresponding to symmetrical and unsymmetrical sources distributions. Each partial solution can be found by the iterative procedure proposed for one-side opened lines. The efficiency of proposed procedure was verified for the case of hybrid radiation modes of microstrip line. The results of calculations of amplitudes and phases of spectral amplitudes in visible spectrum part for examplary hybrid radiation modes are shown. As an example of an application of the hybrid radiation modes concept, the advanced cavity model of rectangular patch antenna is proposed. This model allows to calculate the parameters with acceptable precision nearly ten times faster than professional full-wave design tools. In the 300 Zieniutycz conclusion other possible applications of this approach are proposed e.g., in modal analysis of discontinuities including the radiation effect or 3D rectangular patch analysis.

show abstract

Spectral analysis considerations relevant to radiation and leaky modes of open-boundary microstrip transmission line

Cited by 31 publications

References 9 publications

A full-wave space-domain method for the analysis of leaky-wave modes in multilayered planar open parallel-plate waveguides

A full-wave space-domain method for the analysis of leaky-wave modes in multilayered planar open parallel-plate waveguides

Direct modal transition from space wave to surface wave leakage on microstrip lines

Hybrid Radiationb Modes of Microwave Integrated Circuit (Mic) Lines-Theory and Application

Contact Info

Product

Resources

About